ecmult_impl.h File Reference

#include <string.h>
#include <stdint.h>
#include "util.h"
#include "group.h"
#include "scalar.h"
#include "ecmult.h"
#include "precomputed_ecmult.h"

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Go to the source code of this file.

Classes
struct	secp256k1_strauss_point_state
struct	secp256k1_strauss_state
struct	secp256k1_pippenger_point_state
struct	secp256k1_pippenger_state

Macros
#define	WINDOW_A   5
#define	WNAF_BITS   128
#define	WNAF_SIZE_BITS(bits, w)
#define	WNAF_SIZE(w)
#define	PIPPENGER_SCRATCH_OBJECTS   6
#define	STRAUSS_SCRATCH_OBJECTS   5
#define	PIPPENGER_MAX_BUCKET_WINDOW   12
#define	ECMULT_PIPPENGER_THRESHOLD   88
#define	ECMULT_MAX_POINTS_PER_BATCH   5000000
#define	SECP256K1_ECMULT_TABLE_VERIFY(n, w)

Typedefs
typedef int(*	secp256k1_ecmult_multi_func) (const secp256k1_callback *error_callback, secp256k1_scratch *, secp256k1_gej *, const secp256k1_scalar *, secp256k1_ecmult_multi_callback cb, void *, size_t)

Macro Definition Documentation

ECMULT_MAX_POINTS_PER_BATCH

#define ECMULT_MAX_POINTS_PER_BATCH   5000000

Definition at line 57 of file ecmult_impl.h.

ECMULT_PIPPENGER_THRESHOLD

#define ECMULT_PIPPENGER_THRESHOLD   88

Definition at line 55 of file ecmult_impl.h.

PIPPENGER_MAX_BUCKET_WINDOW

#define PIPPENGER_MAX_BUCKET_WINDOW   12

Definition at line 52 of file ecmult_impl.h.

PIPPENGER_SCRATCH_OBJECTS

#define PIPPENGER_SCRATCH_OBJECTS   6

Definition at line 49 of file ecmult_impl.h.

SECP256K1_ECMULT_TABLE_VERIFY

#define SECP256K1_ECMULT_TABLE_VERIFY	(		n,
			w )

Value:

    VERIFY_CHECK(((n) & 1) == 1); \
    VERIFY_CHECK((n) >= -((1 << ((w)-1)) - 1)); \
    VERIFY_CHECK((n) <=  ((1 << ((w)-1)) - 1));

Definition at line 117 of file ecmult_impl.h.

#define SECP256K1_ECMULT_TABLE_VERIFY(n,w) \
    VERIFY_CHECK(((n) & 1) == 1); \
    VERIFY_CHECK((n) >= -((1 << ((w)-1)) - 1)); \
    VERIFY_CHECK((n) <=  ((1 << ((w)-1)) - 1));

STRAUSS_SCRATCH_OBJECTS

#define STRAUSS_SCRATCH_OBJECTS   5

Definition at line 50 of file ecmult_impl.h.

WINDOW_A

#define WINDOW_A   5

Definition at line 32 of file ecmult_impl.h.

WNAF_BITS

#define WNAF_BITS   128

Larger values for ECMULT_WINDOW_SIZE result in possibly better performance at the cost of an exponentially larger precomputed table. The exact table size is (1 << (WINDOW_G - 2)) * sizeof(secp256k1_ge_storage) bytes, where sizeof(secp256k1_ge_storage) is typically 64 bytes but can be larger due to platform-specific padding and alignment. Two tables of this size are used (due to the endomorphism optimization).

Definition at line 44 of file ecmult_impl.h.

WNAF_SIZE

#define WNAF_SIZE

(

w

)

Value:

WNAF_SIZE_BITS(WNAF_BITS, w)

Definition at line 46 of file ecmult_impl.h.

WNAF_SIZE_BITS

#define WNAF_SIZE_BITS	(		bits,
			w )

Value:

(((bits) + (w) - 1) / (w))

Definition at line 45 of file ecmult_impl.h.

Typedef Documentation

secp256k1_ecmult_multi_func

typedef int(* secp256k1_ecmult_multi_func) (const secp256k1_callback *error_callback, secp256k1_scratch *, secp256k1_gej *, const secp256k1_scalar *, secp256k1_ecmult_multi_callback cb, void *, size_t)

Definition at line 810 of file ecmult_impl.h.